What is the threshold limit value (TLV) for deep body temperature under cold stress?

The threshold limit value (TLV) for deep body temperature under cold stress is established to help prevent hypothermia and ensure that workers remain within a safe temperature range while exposed to cold environments. Maintaining a core body temperature above 36 degrees Celsius or 96.8 degrees Fahrenheit is critical because these values signify a baseline that is generally considered safe for human physiological function.

When a person's core body temperature falls significantly below this threshold, the risk of hypothermia increases, which can lead to serious health complications and affect performance. Setting the TLV at or above this level provides a protective measure against cold stress, allowing employers to implement appropriate controls and monitoring systems to ensure worker safety in cold conditions.

The other options represent temperatures that could correspond to varying degrees of hypothermia or physical stress that would not be acceptable for maintaining worker health and safety standards. Such thresholds indicate temperatures that could lead to physiological impairment or health risks. Thus, establishing a TLV of no lower than 36 C or 96.8 F is crucial for safeguarding the well-being of individuals working in cold environments.